document.write( "Question 806109: Twice the sum of a number and 3 times a second numbers is 4. The difference of ten times the second number and five times the first is 90. Find the numbers. \n" ); document.write( "

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Twice the sum of a number and 3 times a second numbers is 4. The difference of ten times the second number and five times the first is 90. Find the numbers.\r
\n" ); document.write( "\n" ); document.write( "one number -----------x
\n" ); document.write( "second number---y\r
\n" ); document.write( "\n" ); document.write( "2(x+3y)=4
\n" ); document.write( "/2
\n" ); document.write( "x+3y=2
\n" ); document.write( "10y-5x=90\r
\n" ); document.write( "\n" ); document.write( "1 x + 3 y = 2 .............1
\n" ); document.write( "Total value
\n" ); document.write( "-5 x + 10 y = 90 .............2
\n" ); document.write( "Eliminate y
\n" ); document.write( "multiply (1)by -10
\n" ); document.write( "Multiply (2) by 3
\n" ); document.write( "-10 x -30 y = -20
\n" ); document.write( "-15 x + 30 y = 270
\n" ); document.write( "Add the two equations
\n" ); document.write( "-25 x = 250
\n" ); document.write( "/ -25
\n" ); document.write( "x = -10
\n" ); document.write( "plug value of x in (1)
\n" ); document.write( "1 x + 3 y = 2
\n" ); document.write( "-10 + 3 y = 2
\n" ); document.write( " 3 y = 2 + 10
\n" ); document.write( " 3 y = 12
\n" ); document.write( " y = 4
\n" ); document.write( "x=-10,y=4 \n" ); document.write( "

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